催化超临界水氧化对氨基苯酚

Catalytic oxidation para-aminophenol in supercritical water

采用CuO／γ-Al2O3和MnO2/γ-Al2O3为催化剂、H2O2为氧化剂，在一连续流固定床反应器中进行了超临界水氧化对氨基苯酚实验。实验结果表明，CuO和MnO2催化剂对于对氨基苯酚的氧化降解具有显著的促进作用。对氨基苯酚的去除率随反应温度和压力的升高、停留时间的延长而提高，在24～26MPa和400～450℃条件下，数秒钟内COD去除率可达到99％以上，催化剂CuO／γ-Al2O3的催化效果优于MnO2／γ-Al2O3。证明了催化超临界水氧化技术的高效性。

Para-aminophenol was oxidized in supercritical water using CuO/γ-Al2O3 and MnO2/γ-A12O3 as catalysts and H2O2 as a oxidant in a packed-bed flow reactor. The results indicated that CuO and MnO2 catalysts had the desired effects of accelerating the para-aminophenol disappearance. The higher elimination of para-aminophenol was obtained at higher temperature, higher pressure and longer residence time. The 99% elimination of COD was achieved at 24～26 MPa and 400～450 ℃ in a few seconds. The catalytic effect of CuO/γ-Al2O3 catalyst was better than MnO2/γ-Al2O3. It showed that catalytic supercritical water oxidation was a better technology.